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