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