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