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