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