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