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