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