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