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