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)(19,24)(20,29)(21,25)(22,26)(23,28)(27,31)(30,32) involution — undirected(1,3)(2,5)(4,7)(6,8)(9,10)(11,14)(12,13)(15,16)(17,19,23,21)(18,24,28,25)(20,26,32,27)(22,30,31,29)(2,6)(3,7)(10,13)(14,16)(17,20,31,24,23,32,22,25)(18,21,26,30,28,19,27,29)(9,11,12,15)(10,14,13,16)(17,21,23,19)(18,25,28,24)(20,27,32,26)(22,29,31,30)(3,7)(5,8)(17,22,23,31)(18,26,28,27)(19,29,21,30)(20,25,32,24)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.