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