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