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