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