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