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