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