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