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