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