One vertex per element, one color per generator, with an edge from x to x·s.
(5,6,10,16,11,15,27,18)(7,12,19,9,14,24,31,25)(8,20,23,32,22,13,26,30)(17,28,33,36,29,35,34,21)(1,2,3,4)(5,7,11,14)(6,12,15,24)(8,17,22,29)(9,18,25,16)(10,19,27,31)(13,28,20,35)(21,30,36,32)(23,33,26,34)(5,8)(6,13)(7,17)(9,21)(10,26)(11,22)(12,28)(14,29)(15,20)(16,32)(18,30)(19,34)(23,27)(24,35)(25,36)(31,33) involution — undirected(5,9,10,24,11,25,27,12)(6,14,16,31,15,7,18,19)(8,21,26,35,22,36,23,28)(13,29,32,33,20,17,30,34)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.