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