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)(11,15)(12,13)(14,16)(17,18,24,27,23,22,21,26)(19,25,28,20,30,29,32,31)(2,6)(3,4)(9,10)(11,14)(12,13)(15,16)(17,19)(18,25)(20,27)(21,32)(22,29)(23,30)(24,28)(26,31) involution — undirected(1,3,5,4)(2,7,6,8)(10,13)(14,15)(17,20,24,29,23,31,21,25)(18,19,27,28,22,30,26,32)(1,4,5,3)(2,8,6,7)(9,11,12,16)(10,14,13,15)(17,21,23,24)(18,26,22,27)(19,28,30,32)(20,29,31,25)(2,6)(7,8)(17,22,24,26,23,18,21,27)(19,29,28,31,30,25,32,20)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.