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