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