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