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