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