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