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)(11,15)(12,14)(13,16)(17,18)(19,23)(20,24)(21,26)(22,25)(27,35)(28,42)(29,36)(30,37)(31,38)(32,39)(33,40)(34,41)(43,47)(44,46)(45,48) involution — undirected(2,6)(7,8)(9,11)(10,13)(12,16)(14,15)(17,19,22,30)(18,23,25,37)(20,31,32,27)(21,28,34,29)(24,38,39,35)(26,42,41,36)(33,44,45,43)(40,46,48,47)(1,3,5,4)(2,7,6,8)(10,14)(11,16)(17,20)(18,24)(19,27)(21,33)(22,32)(23,35)(25,39)(26,40)(28,43)(29,44)(30,31)(34,45)(36,46)(37,38)(41,48)(42,47)(10,14)(13,15)(18,25)(19,28)(21,34)(23,36)(24,39)(27,43)(29,30)(31,44)(33,45)(35,46)(37,42)(38,47) involution — undirected(1,4,5,3)(2,7,6,8)(10,14)(13,15)(20,32)(24,39)(27,31)(33,45)(35,38)(40,48)(43,44)(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.