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