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