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