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