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