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