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