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