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