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