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