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