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