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