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)(18,23)(20,31)(21,32)(24,33)(25,34)(26,38)(27,37)(29,44)(30,43)(35,36)(39,42)(40,45)(41,48)(46,47) involution — undirected(2,7)(8,15)(9,10)(11,16)(17,18,24,38,21,26,20,23,22,27,31,36,32,35,33,37)(19,25,39,48,30,41,29,34,28,40,44,47,43,46,42,45)(1,3)(2,8)(4,12)(5,13)(6,14)(7,15)(9,11)(10,16)(17,19)(18,25)(20,29)(21,30)(22,28)(23,34)(24,39)(26,41)(27,40)(31,44)(32,43)(33,42)(35,46)(36,47)(37,45)(38,48) involution — undirected(1,4,5,6)(2,9,7,10)(3,12,13,14)(8,11,15,16)(19,28)(25,40)(29,42)(30,43)(34,45)(39,44)(41,46)(47,48)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.