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