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