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