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