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