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