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