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