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