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