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