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