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