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)(18,19)(23,25)(24,26)(31,32)(33,34,38,39)(35,41,42,36)(37,45,46,40)(43,44,48,47)(4,11)(8,14)(10,15)(12,16)(17,18,22,19)(20,25,28,23)(21,24,30,26)(27,32,29,31)(33,35,38,42)(34,36,39,41)(37,43,46,48)(40,44,45,47)(2,7)(3,9)(8,14)(10,15)(34,39)(35,42)(40,45)(43,48) involution — undirected(1,3,6,9)(2,5,7,13)(4,10,11,15)(8,12,14,16)(17,19,22,18)(20,25,28,23)(21,26,30,24)(27,32,29,31)(33,34)(35,36)(37,40)(38,39)(41,42)(43,44)(45,46)(47,48)(1,4)(2,8)(3,10)(5,12)(6,11)(7,14)(9,15)(13,16)(17,20)(18,23)(19,25)(21,29)(22,28)(24,32)(26,31)(27,30)(33,36)(34,35)(37,44)(38,41)(39,42)(40,43)(45,48)(46,47) involution — undirected(1,5)(2,9)(3,7)(4,12)(6,13)(8,15)(10,14)(11,16)(17,21,22,30)(18,24,19,26)(20,27,28,29)(23,31,25,32)(33,37,38,46)(34,40,39,45)(35,43,42,48)(36,44,41,47)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.