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