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