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