One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,5,8)(3,6,10,14)(4,7,12,16)(9,13,11,15)(17,18,22,27,23,28,21,26)(19,29,31,41,32,40,38,24)(20,25,36,44,37,34,35,43)(30,42,33,45,46,47,48,39)(1,3)(2,6)(4,11)(5,10)(7,15)(8,14)(9,12)(13,16)(17,19,23,32)(18,24,28,41)(20,33,37,48)(21,31,22,38)(25,42,34,47)(26,29,27,40)(30,35,46,36)(39,43,45,44)(1,4)(2,7)(3,9)(5,12)(6,13)(8,16)(10,11)(14,15)(17,18,23,28)(19,24,32,41)(20,34,37,25)(21,26,22,27)(29,38,40,31)(30,45,46,39)(33,47,48,42)(35,44,36,43)(4,12)(7,16)(9,11)(13,15)(17,20,21,35,23,37,22,36)(18,25,26,43,28,34,27,44)(19,30,38,48,32,46,31,33)(24,39,40,47,41,45,29,42)(2,8)(3,10)(7,16)(9,11)(17,21,23,22)(18,26,28,27)(19,31,32,38)(20,35,37,36)(24,29,41,40)(25,43,34,44)(30,33,46,48)(39,42,45,47)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.