One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,6)(4,7)(5,8)(9,10)(11,13)(12,14)(15,16)(17,18)(19,20)(21,29)(22,24)(23,27)(25,30)(26,31)(28,32)(33,34)(35,38)(36,45)(37,41)(39,42)(40,44)(43,48)(46,47) involution — undirected(1,2,5,8)(3,6,9,10)(4,7,12,14)(11,13,15,16)(17,19)(18,23)(20,24)(21,26)(22,27)(25,31)(28,29)(30,32)(33,35)(34,38)(36,37)(39,43)(40,46)(41,45)(42,48)(44,47)(3,9)(4,12)(6,10)(7,14)(18,24)(20,23)(21,30)(26,32)(35,43)(36,44)(38,48)(40,45) involution — undirected(1,3)(2,6)(4,11)(5,9)(7,13)(8,10)(12,15)(14,16)(17,20,22,23)(18,19,24,27)(21,28,30,31)(25,26,29,32)(33,36)(34,40)(35,37)(38,46)(39,44)(41,48)(42,45)(43,47)(1,2)(3,10)(4,7)(5,8)(6,9)(11,16)(12,14)(13,15)(17,19)(18,20)(21,26)(22,27)(23,24)(25,28)(29,31)(30,32)(33,37)(34,41)(35,44)(36,43)(38,40)(39,47)(42,46)(45,48) involution — undirected(1,4,5,12)(2,7,8,14)(3,11,9,15)(6,13,10,16)(17,21,22,30)(18,25,24,29)(19,26,27,32)(20,28,23,31)(33,38)(34,35)(36,46)(37,40)(39,48)(41,44)(42,43)(45,47)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.