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