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