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