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