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