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