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