One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,8)(4,7)(5,6)(9,10,15,13)(11,12,16,14)(3,4)(7,8)(10,13)(11,16)(17,18)(19,27)(20,24)(21,25)(22,26)(23,29)(28,32)(30,31) involution — undirected(1,3)(2,7)(4,6)(5,8)(9,11)(10,14)(12,13)(15,16)(17,19,22,29)(18,23,26,27)(20,21,30,28)(24,32,31,25)(3,4)(7,8)(9,12,15,14)(10,11,13,16)(17,20,22,30)(18,24,26,31)(19,28,29,21)(23,25,27,32)(1,4,6,3)(2,7,5,8)(9,13,15,10)(11,12,16,14)(17,21,22,28)(18,25,26,32)(19,20,29,30)(23,31,27,24)(1,5,6,2)(3,7,4,8)(9,14,15,12)(10,16,13,11)(17,18)(19,27)(20,24)(21,25)(22,26)(23,29)(28,32)(30,31)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.