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