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