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