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