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