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