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