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