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