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