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