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