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