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