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