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