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