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