One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,9)(5,10)(6,7)(11,16)(12,15)(13,14)(17,18)(19,26)(20,23)(21,29)(22,24)(25,30)(27,31)(28,32)(33,34)(35,38)(36,45)(37,41)(39,42)(40,44)(43,48)(46,47) involution — undirected(2,7)(4,14)(8,16)(10,12)(17,19,22,20)(18,23,24,26)(21,27,30,28)(25,31,29,32)(33,35)(34,38)(36,37)(39,43)(40,46)(41,45)(42,48)(44,47)(3,11)(5,15)(8,16)(10,12)(18,24)(21,30)(23,26)(27,28)(35,43)(36,44)(38,48)(40,45) involution — undirected(1,3,6,11)(2,8,7,16)(4,10,14,12)(5,13,15,9)(17,18)(19,23)(20,26)(21,25)(22,24)(27,31)(28,32)(29,30)(33,36)(34,40)(35,37)(38,46)(39,44)(41,48)(42,45)(43,47)(1,4,6,14)(2,9,7,13)(3,12,11,10)(5,8,15,16)(17,20,22,19)(18,23,24,26)(21,28,30,27)(25,31,29,32)(33,37)(34,41)(35,44)(36,43)(38,40)(39,47)(42,46)(45,48)(1,5,6,15)(2,10,7,12)(3,13,11,9)(4,8,14,16)(17,21,22,30)(18,25,24,29)(19,27,20,28)(23,31,26,32)(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.