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