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