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