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