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