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