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