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