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