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)(19,23,26,21)(20,25,30,32)(27,29,28,31)(33,34)(35,36)(37,45)(38,42)(39,40)(41,47)(43,48)(44,46)(1,3,6,11)(2,7,8,14)(4,9,12,15)(5,10,13,16)(17,19,22,26)(18,23,24,21)(20,28,30,27)(25,31,32,29)(33,35,38,40)(34,39,42,36)(37,43,47,46)(41,48,45,44)(2,8)(4,12)(7,14)(9,15)(18,24)(19,26)(25,32)(27,28)(33,36,38,39)(34,40,42,35)(37,44,47,48)(41,46,45,43)(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)(28,31)(30,32)(33,36)(34,35)(37,44)(38,39)(40,42)(41,43)(45,46)(47,48) involution — undirected(1,3)(2,7)(4,9)(5,10)(6,11)(8,14)(12,15)(13,16)(17,20,22,30)(18,25,24,32)(19,27,26,28)(21,31,23,29)(33,35)(34,36)(37,46)(38,40)(39,42)(41,48)(43,47)(44,45)(1,5)(2,4)(3,10)(6,13)(7,9)(8,12)(11,16)(14,15)(17,21,22,23)(18,26,24,19)(20,29,30,31)(25,27,32,28)(33,37)(34,41)(35,43)(36,44)(38,47)(39,48)(40,46)(42,45)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.