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