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