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