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