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