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