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