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