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