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