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