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