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