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