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