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