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