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