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