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