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