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