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