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