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