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