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