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