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