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