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