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