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