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