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