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