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