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