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