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