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