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