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