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