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