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