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