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