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