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