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