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