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)(17,18,23,22)(19,24,21,26)(20,25,29,30)(27,31,28,32)(2,3)(6,7)(11,15)(14,16)(17,19)(18,24)(20,27)(21,23)(22,26)(25,31)(28,29)(30,32) involution — undirected(1,2,5,3)(4,6,8,7)(9,10)(11,14)(12,13)(15,16)(19,21)(24,26)(27,28)(31,32)(1,3,5,2)(4,7,8,6)(9,11,12,15)(10,14,13,16)(17,20)(18,25)(19,27)(21,28)(22,30)(23,29)(24,31)(26,32)(1,4)(2,6)(3,7)(5,8)(9,10)(11,14)(12,13)(15,16)(17,21,23,19)(18,26,22,24)(20,28,29,27)(25,32,30,31)(17,22,23,18)(19,26,21,24)(20,25,29,30)(27,31,28,32)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.